ERROR-A
ERROR-A / Search

Start with a symptom, message or error code.

Explore
Menu
ProblemBluetooth toggle or adapter missing

Bluetooth disappeared in Windows

Windows no longer offers Bluetooth or cannot turn it on. First check whether the adapter is still detected. A visible Bluetooth adapter that cannot connect to an accessory needs a different troubleshooting path.

Try this first

1 quick checks · ~2 min

  1. Check wireless controlsRule out a disabled control before changing drivers.

Diagnostic signals

ObservationAdapter present or absent
Look for Bluetooth in Device Manager. Read the device status if there is a warning; an absent entry alone does not prove hardware failure.

Step-by-step solutions

01

Check wireless controls

  • Estimated time: 2 min
  • Easy
  • Low risk

Rule out a disabled control before changing drivers.

  1. Open Settings and look for Bluetooth: Bluetooth & devices in Windows 11, or Devices in Windows 10.

  2. Turn airplane mode off. Enable Bluetooth if its switch exists; otherwise continue with the adapter check.

Sources:
02

Check what Windows detects

  • Estimated time: 3 min
  • Easy

Record the adapter name and device status.

  1. Open Device Manager from Start and expand Bluetooth if listed. Open the adapter properties and record any error.

  2. If this PC never had Bluetooth, check its specifications. Not every PC includes Bluetooth hardware.

Sources:
03

Restart and run diagnostics

  • Estimated time: 5 min
  • Easy
  • Low risk
  • Restart required

Check whether detection returns after restarting.

  1. Save your work and choose Restart from Start.

  2. If Bluetooth is still missing, open Get Help and find the Bluetooth troubleshooter. Review its result before repeating changes.

Sources:
Advanced

Advanced checks

Continue if the earlier steps did not help. Read each procedure’s precautions first.

04

Look for a compatible driver

  • Estimated time: 10 min
  • Intermediate
  • Low risk
  • Administrator required
  • Restart required

Use Windows Update or the PC manufacturer’s support site.

  1. If the adapter is listed, choose Update driver in Device Manager and search automatically.

  2. If it is missing or the issue remains, check Windows Update and official support for the exact PC model and Windows version. Restart if the installer requests it.

Sources:
Next step

Still not working?

If the adapter remains absent, give the manufacturer your model and recorded errors. If it returns but pairing fails, continue with Bluetooth won’t connect.

Sources

Documentation behind this guide. Editorial recommendations are identified separately.

Source review: . A documentation review, not a physical hardware test.

Related problems

windows
Problem

Bluetooth won’t connect in Windows

Bluetooth is available, but Windows cannot connect to an accessory. Distinguish a device that never enters pairing mode from a saved device that stopped connecting before changing drivers.

View solution
windows
Problem

Wi-Fi option missing in Windows

Windows does not show the option to enable Wi-Fi. First check whether the wireless adapter is present and enabled. Restarting the router alone does not restore an adapter Windows cannot detect.

View solution